What does the Baxi Platinum F31 fault code mean?
The F31 fault code on a Baxi Platinum boiler indicates a pump fault, which typically means that the central heating pump is either not operating correctly or has failed. This can lead to inadequate circulation of water within the heating system, resulting in heating issues.
Common Causes
- Blocked Pump: Debris or sludge can accumulate in the pump, preventing it from functioning properly.
- Electrical Fault: Issues with the electrical supply to the pump or a faulty pump motor can cause it to stop working.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to diagnose and repair the pump fault, as working with gas appliances can be dangerous. However, you can check the boiler pressure and reset the boiler if necessary.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for a pump replacement on a Baxi Platinum boiler is around £250 to £350. This includes the cost of the pump and labour, reflecting the complexity of the work involved.